National Gravity Compilation 2019 Ausdrape Elevation Geoid Image

2019 elevation data for the Australian National Gravity Grids B series, processed from SRTM surface elevation. The grid has a cell size of 0.00417 degrees (approximately 435 meters) and data are vertically continued to a drape surface with a minimum clearance of 250 meters. It was produced by Geoscience Australia Data.

Use Cases

• Modeling terrain height variations based on the processed SRTM surface elevation data.
• Analyzing gravity anomalies based on the elevation data for the 2019 Australian National Gravity Grids.
• Creating hillshade visualizations based on the elevation geoid image (HSI).
• Simulating airborne survey paths based on the described drape surface with specific climb/descent rates.

Strengths

• Grid cell size is specified as 0.00417 degrees (approximately 435 meters).
• Processing parameters are detailed, including a minimum surface clearance of 250 meters and isotropic maximum climb/descent rates of 25 m per km.
• Data integrates ground, airborne, and marine sources derived from satellite altimetry.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Geoscience Australia Data

Collection Method

Processed from SRTM 3 second grid data, with ground, airborne, and marine data vertically continued to a drape surface.

Time Range

2019

Freshness

Last updated 2026-05-14 03:11:50.129984; freshness should be verified.

Geography

Australia